Electric wiring system for signals



Nov. 9 1926.

F. v. EASTMAN ELECTRIC WIRING SYSTEM FOR SIGNALS Filed July 28, 1922ffige W i110" @0000 Docitors d RES/5 TANLE INVENTOR Z'KEasZWaa/aWITNES'SES ATTORNEYS Patented Nov. 9, 1926."

UNITED STATES V. EASTMAN, OF TAKOMA. PARK, MARYLAND;

ELECTRIC WIRING SYSTEM FOR SIGNALS.

Application filed July 28, 1922. Serial No. 578,138.

' be installed.

It is a further and important object of the invention that the system beadapted to be selectively operated whereby 'the physician or otheroccupant of an office may at any time previous to the moment of apatient or customer calling set or arrange the system so that his wisheswill be indicated to the patient or customer upon the patient orcustomer announcing his arrival.

A still further object of the invention is that the system be entirelyautomatic in operation and reliable.

Other objects'will hereinafter appear.

The invention is illustrated by way of example in the accompanyingdrawing in which the figure represents a diagrammatic view of thepresent wiring system and arrangement of the different units or elementsemployed.

Referring to the drawing more particularly, A, B, G and D represent nameplates or signs which should be arranged in any manner desired andshould be positioned in the waiting room of the ofiice in which thepresent wiring system is installed. These nameplates may consist in anordinary lens supported within the proper socket or casing and beneaththe lens an electric light is mounted so that upon energizing theelectric light the lens is illuminated. The name plate A should haveprinted thereon the Words Ofice hours and also the hours during whichthe occupant of the ofiice will be present; the name plate B may haveprinted thereon Please press the button or other Words having thesame'meaning; the name plate G might have written or printed thereon theword Come, and the name plate D the word Wait.

I further employ a resistance li ht L and switches S S S S and 8. alsoemploy a bell E or other audible signal. The wires 10 and 11 may beconnected to any suitable source of electric current supply, preferablydirect current, and the voltage equal to that usually employed forelecof110 volt type. The switches S S and S are alike and each switchcomprises a depressible strip of metal or contactor 12,

a push button 13 and the two contacts 14 and 15. This particular type ofswitch .is employed in order to obtain the objects of the presentinvention. The first pair constitutes a master switch, the last anindividual push button switch.

The switch S may consist in a base'plate 16 and a pivoted switch arm 17.The switch S consists in a base. plate 18, a pivoted switch arm 19having a handle 20 and adapted to be brought into engagement with thecontacts A, D, C and N.

The feed wire 10 is connected through the wires 20, 21 and 22 to oneside of the lights beneath the name plate B. The wire 21 is extended andconnected at one side of the light beneath the name plate A as at 23. Awire 24 has its one end connected to the one side of the light beneaththe name plate A and its other end connected to the contact point A ofthe switch S The wire 21 is also connected to the one side of the lightsbeneath the name plates G and D as at 25 and 26 respectively and isfurther connected through the wire 27 with the contact point N of theswitch S. The remaining sideof the light beneath the name plate B isconnected to the wire 28 to a contact point of the switch S as at 29 andthe switch arm 17 of the switch S is in turn connected through wires 30with the contact point 13 of the switch S The remaining side of thelight beneath the name plate C is connected through wire 31 to a wire 32and the wire 32 has its one end connected to the contact G of the switchS and its other end connected to the contact 15 of the switch S. Theremaining side of the light beneath the name plate D is connectedthrough wires 33 and 34 to the contact point D of, the switch S The wire'33 is also connected to the contact point 15 of the switch S A wire 35'extends between one side of the bell E and the switch arm 19 and theother side of the bell E is connected to the contact 14 of the switch Sas shown. The contact point. 14 and switch S are connected to the switcharm 12 by a wire 36 and the contactpoint 14 of the-switch S is connectedto the a switch arm 12 of the switch S as shown. The switch arm 12 ofthe switch S is con nected to one side of the light L throu h the wire37 and the other side of the lig t L is connected to the feed wire 11,as shown.

The wires 11, 37 36, 28, 22, 21, 20 and 10 are herein regarded as thenormall closed circuit, the switches S, S, S and bein so set as tonormally close the circuit and continuously energize the signal B. Thewire 35 and the wires 24; 32, 31' and 34, 33 leading from the selectorswitch s to the remaining signals A, C and D are regarded as parts ofnormally 0 en circuits in which the wire 36 and the pair of switches Sand S are included upon operation of the switch S when the selectorswitch is appropriately set. The wires 32 and 34 extending from the.connections 31 and 33 to the contacts 15 of said pair of switches areportions of the foregoing normally open circuits.

- The operation of the present invention is as follows: Assuming thatthe pair of switches S.and S is supported or located in an office withinconvenient reach of the occupant of the ofiice and that the push buttonswitch S is located in the waiting room of this ofiice. The selectorswitch S should also be located within the office. Now if the arm 19 ofthe switch S is turned so that it engages contact A it will connect thewires 24 and 35. The switch S is closed. D epression of the button 13 ofthe switch S the name late A will illuminate the signal A and t epatient will be informed of the ofiice hours of the doctor. The circuitthen operative comprising the wire 11, lamp L, switches S and S wire 36,switch 3*, wire 35, switch S wire 24 to the light beneath the name plateA and from thence through the wires 21 and 20 and to the feed wire 10.Also during this interval the bell E would be operated thus announc--ing to the occupant of the oflice that a patient or customer has called.Now the occupant of the ofiice may indicate to the patient or customerto wait or 'come by pressing either of the buttons S or S, respectivelyQAssuming that he desires the patient to come into his oflice and pressesthe button 13 of the switch S then the current will travelfrom-theswitch S through wire 32 to the light beneath the name plate Cand from thence through the wires 21 and 20 to the feed wire 10. If theoccupant of the ofiice had pressed button 13 of the switch S, then thecurrent would pass through the wire 33 to the light beneath the nameplate D and from thence through the wires 21 and 20 to the feed wire 10.

As previously stated, the switch S should be closed during the presenceof the mom pant of the oflice and with this switch closed the currentwill travel from the feed wire neath the name plate B and through thewires 21 and 20 to the feed wire 10. The

name plate B having printed thereon the words Please press button willtherefore be illuminated at all times.

Should the occupant of the oifice desire to leave. his desk or otherlocation where the switches S, S and S are located and desire to set thesystem so that his wishes will be indicated upon a customer or patientclosing the switch S, then he may operate the switch S so that thefreeend of the switch arm 19 may contact with either the contact point D orC. If contact point D is engaged by the switch arm 19 then upon a personclosing the switch S the bell E will ring and the current will travelthrough the switch arm 19 through the wire 34 and 2 thence through thelight beneath the name plate D and continue through the wires 21 and 20to the feed wire 10. If the switch arm 19 is brought to engage thecontact arm C then the current will travel through the wires 32 and 31throu h the light beneath the name plate C and IOIIl thence through thewires 21 and'20 to the feed wire 10.

If the switch arm 19 of the switch S is rent will travel from the lightL through the switches S, S S", bell E, wire 35,

switch S thence through the wires 27, 21 and 20 to the feed wire 10.Only the bell E will be operated with this arrangement, that is assumingthat the switch S has been opened. The customer or patient will, ofcourse, hear the bell ringing and if no response is made he will assumethat no one is present in the ofiice. This manner of notifyin a patientor customer may be utilized. H owever, it is better if the switch S isoperated so that the arm 19 will connect the wires 24 and 35 and thenupon the customer or patient closing the switch S the bell E will beenergized and the current will flow through the lights beneath the nameplate A and thus illuminate this plate and notify the customer orpatient of the ofiice hours of the occupant of the oflice. With thisarrangement the switch S may be closed and thus always suggest to thepatient or customer to press the button 13 of the switch S While I haveshown the general and preferred form of the name plates, switches and aresistance employed in carrying out my invention, I here wish it to beunderstood that I am not to be so limited as indiway switches biased toone circuit closing position two of said switches being in said ofiiceand one at said wating room, a normally closed circuit seriallyincluding. the normally closed contacts of all of the said switches anda signal at said waiting-room instructing operation of the switch atsaid room, an audible signal in said office, a circuit thereforincluding serially the normally open contact of the switch at thewaitingroom the normally closed contacts of the two switches in saidoffice and a selective switch and a pair of branches including a pair ofdirecting signals indicating come and wait respectively and separatecontacts of said selective switch, whereby either of said directingsignals may be connected in series with said audible signal, permittingoperation of the switch at said waitingroom to close the circuit to saidaudible signal and to the selected one of said directing signals, abranch circuit for each of said directing signals including respectivelythe normally open contact of said two-way switches in said ofiice,whereby operation of one of said switches opens the circuit closed bysaid waiting room switch and closes the circuit to the other of saiddirecting signals.

2. In a signal system between two separated stations, a plurality oftwo-way switches biased to one circuit closing position, two of saidswitches being in one of the stations and one at the other of thestations, a normally closed circuit serially including the normallyclosed contact of all of said switches and a signal at said otherstation instructing operation of the switch in said other station, anaudible signal in said one station, a circuit therefor includingserially the normally open contact of the switch in said other station,the normally closed contacts of the two switches in said one station anda selective switch, and a pair of branches including a pair of directingsignals indicating come and wait respectively and separate contacts ofsaid selective switch, whereby either of said directing signals may beconnected in series with said signal permitting operation of the switchin said other station to close the circuit through said audible signaland to the selected one of said directing signals, a branch circuit foreach of said directing signals including respectively the normally opencontact of said two-way switches in ,said one station, whereby operationof one of saidswitches opens the circuit closed by said other stationswitch and closes the circuit to the other of said directing si als. IFRANK V. EAST N..

